A 75-cm-long, massless, horizontal bar is connected at one end to an electric motor that rotates the bar at a constant angular speed of 48 rpm. A 250-gram ball is attached to the other end. Calculate the magnitude of the ball's velocity.

• A. 0.6 m/s
• B. 2.3 m/s
• C. 3.8 m/s
• D. 36 m/s

Answer: (C)